bursa

from WordNet (r) 3.0 (2006)

Bursa
    n 1: a city in northwestern Turkey [syn: {Bursa}, {Brusa}]
    2: a small fluid-filled sac located between movable parts of the
       body especially at joints

from The Collaborative International Dictionary of English v.0.48

Bursa \Bur"sa\, n.; pl. {Burs[ae]}. [L. See {Burse}.] (Anat.)
   Any sac or saclike cavity; especially, one of the synovial
   sacs, or small spaces, often lined with synovial membrane,
   interposed between tendons and bony prominences.
   [1913 Webster]